package cn.edu.scau.cmi.wujiaxian.exercise6;

public class Example6_6 {
	
	public static void main(String[] args) {
		C c = new C();
		System.out.println("面积：" + c.getArea(100));
		c.speak();
	}
	
}

class C {
	final double PI = 3.1415926;
	public double getArea(final double r) {
		return PI * r * r;
	}
	public final void speak() {
		System.out.println("你好，How's everything here？");
	}
}
